• Title/Summary/Keyword: Rapid Prototyping system

Search Result 48, Processing Time 0.228 seconds

Development of Sheet Deposition Type Rapid Prototyping System Minimizing Post Processing (후처리를 최소화하는 판재적층방식 쾌속조형기의 개발)

  • Cho, In-Haeng;Lee, Kun-Woo;Song, Yong-Ak
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.16 no.7
    • /
    • pp.210-218
    • /
    • 1999
  • Sheet deposition type rapid prototyping system have many advantages : high build speed, low operating cost, large part size, no phase change, no need for support generation, and forth. However, those sheet deposition type rapid prototyping system require an additional post processing to remove excessive material attached to the part. This post processing is time consuming and labor intensive. Moreover, it is difficult for those system to fabricate parts with hollow cores and internal cavities. A new sheet deposition type rapid prototyping system that minimizes the post processing is proposed. The proposed system automatically removes excessive material in a peeling-off process between two cutting processes. In this way, the proposed system can reduce the post-processing time and cost as well as the limitation of the feasible geometric shapes in the conventional sheet deposition system.

  • PDF

A Study on Micromachining Using Stereolithographic Rapid Prototyping System (광조형법을 이용한 마이크로가공에 관한 연구)

  • Kim, D.W.;H.C. Chae;Kim, N.G.
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.14 no.6
    • /
    • pp.99-105
    • /
    • 1997
  • Recently, with a great interest in micromachine, it is more and more important to promote the way of manufacturing micromachine. The silicon process or the LIGA process was the main method to manufacture micromachine in the past. But, these manufacturing method was 2.5-dimensinal, there was the limit in manufacturing perfect 3-dimensional structure micromachine. In this study, we developed the rapid prototyping system for micromachining and tested its property. We also realized .mu. m-order manu- facturing and 3-dimensional structure processing. The results showed the possibility of micromachining with the rapid prototyping system.

  • PDF

A study on the development of rapid prototyping system using 5 axis machining (5축 가공을 이용한 쾌속조형 시스템의 개발)

  • 정태성;양민양
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • /
    • pp.1011-1014
    • /
    • 2002
  • In order to reduce the lead-time and cost, many useful methods have been applied to Rapid Prototyping (RP) in recent years. But cutting process is still considered as one of the effective RP methods that have been developed and currently available in the industry. It also owen practical advantages such as precision and versatility. However, traditional 3 axis NC machining has some inherent limitations such as the restriction of tool accessibility and the complex setup. In this work, a new rapid prototyping system with high speed 5 axis machining has been developed to overcome those limitations. The architecture of developed system is described in detail and the successful application examples are presented.

  • PDF

A Study on Error Verification of STL Format for Rapid Prototyping System (급속조형 시스템을 위한 STL 포맷의 오류 검증에 관한 연구)

  • Park, H.T.;Lee, S.H.
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.13 no.10
    • /
    • pp.46-55
    • /
    • 1996
  • As industrial standard data, the STL format which approximates three dimensional CAD model to triangular facets, is used for RP(Rapid Prototyping) system in recent days. Because most RP system take the only form of two dimensional line segments as an input stream inspite of its imperfectness while converting into STL format, a CAD model is converted into a standard industrial format which is composed of many triangular facets. The error verifying process is composed of four main steps, and these are 1) Remove facets with two or more vertices equal to each other. 2) Fix overlapping error such as more than three facets adjacent to anedge. 3) Fill holes in the mesh by using Delaunay triangulation method. 4) Correct the wrong direction and normal vectors. This paper is concerned with serching the mentioned errors in advance and modifying them.

  • PDF

A Study on Error Verification of STL format for Rapid Prototyping System (급속조형시스템을 위한 STL 포멧의 오류 검증에 관한 연구)

  • 최홍태;이석희
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • /
    • pp.597-601
    • /
    • 1996
  • Nowadays, the STL format, industrial standard data, which approximates three dimensional CAD model to triangular facets, is used for RP(Rapid Prototyping) system. Because most RP machine is accpted to only two dimensional line segments, but some STL translators are sometimes poorly implemented. The error verifying process is as follows. 1) Remove facets with two or more vertices equal to each other. 2) Fix overlapping error such as more than three facets adjacent to an edge. 3) Fill holes in the mesh by using Delaunay triangulation method. 4) Repair wrong direction and value of normal vectors. This paper is concerned with searching the mentioned errors in advance and modifying them.

  • PDF

광조형을 이용한 마이크로가공에 관한 기초적인 연구

  • 김동욱
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • /
    • pp.161-165
    • /
    • 1996
  • Recently, with a great interest in micromachine, it is more and more important to promote the way of manufacturing micromachine. The silicon process or the LIGA process was the main way to manufacture micromachine in the past. Because these processing method was 2.5-dimensional, there was the limit in processing perfect three-dimensional micromachine. In this study, we developed the rapid prototyping system for micromachine and tested its property. We also realized .mu. m - order processing and three-dimensional structure processing. The results showed the possibility of manufacturing micromachine with the rapid prototyping system

  • PDF

A Blind Watermarking Algorithm of 3D Mesh Model for Rapid Prototyping System Application (RP 시스템 적용을 위한 3차원 메쉬 모델의 블라인드 워터마킹)

  • Ji-Zhe, Cui
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.32 no.12C
    • /
    • pp.1194-1202
    • /
    • 2007
  • In this paper, we proposed a blind watermarking algorithm to apply to the rapid prototyping system. The 3D mesh model is used in the step of the CAD modeling before the making of the prototype system of the rapid prototyping system. STL type mesh modeling which is used in this system reduces the error of the system and improves the accuracy of the system. In the step of the CAD modeling, some transformations which do not change the model accuracy are used, but some transformations which change the model accuracy are not used because the mesh model error is related to the accuracy of the prototype system. Most watermarking algorithms embedded a specific random noise as the watermark information into the model. These kinds of the algorithms are not proper to the 3D model watermarking. The proposed algorithm can be used for the accurate prototyping system because it does not change the model after the watermark embedding This means it can be used for the copyright marking and the data integrity.

A Study on the Standardization In the Mandibular First Premolar of the Middle Aged Korean (하악 제1소구치의 표준화 연구)

  • Lee H.J.;Chun K.J.;Chung D.T.;Cho C.H.
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • /
    • pp.252-255
    • /
    • 2005
  • Mandibular first premolars obtained from the middle-aged men about the ages of 50 were scanned using a Micro-CT. A Jig was made for a Micro-CT measurement to get reliable data from irregular teeth shape. Data were measured from the scanned 2-D images by way of measurement software. the methodology fer measurement of the mandibular first premolar was presented and according to this, the standardized mandibular first premolars of middle aged Korean males and females were made by using a rapid prototyping system.

  • PDF

A Rapid Packing Algorithm for SLS Rapid Prototyping System (SLS 쾌속조형장치를 위한 고속 패킹 알고리즘 개발)

  • 김부영;김호찬;최홍태;이석희
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • /
    • pp.561-564
    • /
    • 2002
  • With Rapid Prototyping system, the efficient packing in a fixed work volume reduces build time when multiple parts are built in a process. In this paper, an efficient and rapid packing algorithm is developed for SLS system that has cylindrical workspace. A genetic algorithm is implemented to place as many part as possible in a vat. For fast computation, a collision detection algorithm "k-DOPs Tree" is implemented.

  • PDF

Reduction of processing time for concept printer with model splitting (모델 분할을 이용한 컨셉 프린터의 가공시간 단축)

  • Lee, In-Tak;Kim, Ho-Chan;Guen, Min-Hyung;Lee, Suk;Lee, Seok-Hee
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • /
    • pp.105-108
    • /
    • 1997
  • To reduce design period, demands for rapid prototyping system is increasing. Among the rapid prototyping system, as a concept modeler, 3D Printer appears before the footlights. In spite of short production time and convenience, 3D Printer causes post processing problem. And that is too slow to adapt to the demand of workshop. In this research, we developed a system for reducing build time and roughness using splitting operation. Also, propose BFS(B-rep For STL) data structure to maintain model data, split STL model and implement Euler Operation for input and output.

  • PDF